Improvement in portable derricks



AQ MBHARRY. Portable Derrioks.

No. 198,895. Patented .Ian-. 1,1873.

INVENTOR' f" ATTORNEYZ N PETERS. PHOTO-LITHOGRAPHER. WASHINGTON. D c.

UNITED STATES; PATENT OFFICE.

ALEXANDER MEHARRY, OF LA FAYETTE, INDIANA.

IMPROVEMENT IN PORTABLE DERRICKS.

Specification forming part of Letters Patent No. 198,895, dated January1, 1878; application filed August 18, 1877.

To all whom it may concern Be it known that I, ALEXANDER MEHALRRY, of LaFayette, in the county of Tippecanoe and State of Indiana, have inventeda new and valuable Improvement in Portable Derricks; and I do herebydeclare that the following is a full, clear, and exact description ofthe construction and operation of the same, reference being had to theannexed drawings,

made, fully illustrates my invention.

A represents the upright or main support, made of gas-pipe orothersuitable tubing, of any desired dimensions. Being hollow, thisupright can be slipped down over an iron stake fastened in the groundfirmly in the edge of the pavement, or wherever needed for use. To oneside of this tubular upright A is clamped or otherwise fastened a frame,B, in which is mounted an ordinary windlass, 0, having crank G, ratcheta, and pawl 12, substantially as shown.

On the side of the Windlass the upright A is braced by means of abow-brace, E, to with stand the strain that comes upon it.

D represents the top beam of the derrick, provided with a bowed brace,D, on top.

The annexed drawing, to which reference is I.

This beam is, near each end, provided with a mortise, in which a pulley,c, is mounted for the passage of the hoisting-rope d. The'beam D ispivoted in a metal. loop, G, which is formed with a round shank, G, tobe inserted in the upper end of the upright A; and the beam is heldstationary, in proper position for hoisting, by means of a hook, H,pivoted to the brace E, and hooking over a screw, f, or its equivalent,in the under side of the beam. The rope d is fastened to the Windlass G,and passed over the pulleys e, as shown.

When the article is raised by the derrick the hook H is released, andthe beam D can then be swung to either side, as required.

This derrick can be readily taken down and apart, so as to occupy butlittle space and it can be easily put up again, when needed for use.

What I claim as new, and desire to secure by Letters Patent, is-

1. A portable derrick, consisting of a tubu- "lar upright, with sideframe, carrying a windlass, and a top beam, pivoted in a metal loop,

turning in and removable from the upper end of the upright,substantially as and for the purposes set forth.

2. The combination of the tubular upright A, frame B, Windlass O, andbow-brace E, substantially as and for the purposes set forth. Intestimony that I claim the above I have hereunto subscribed my name inthe presence of two Witnesses.

ALEXANDER MEHARRY. Witnesses:

EDWARD GROENENDYKE, CHARLES GROENENDYKE.

